Jawaharlal Nehru Technological University Hyderabad 2005-2nd Sem B.E Computer Science COMPUTER NETWORKS III B.Techester Regular s, il/ set 1 - Question Paper

Code No: RR320503 Set No.1
III B.Tech. II Semester Regular Examinations, April/May 2005
COMPUTER NETWORKS
( Common to Computer Science & Engineering,Information
Technology,Electronics & Control Engineering,Computer Science & Systems
Engineering and Electronics & Computer Engineering)
Time: three hours
ans any 5 ques.
All ques. carry equal marks
********
Max Marks: 80
1. (a) Why network software is designed based on layer model?
explain the advantages
and disadvantages of the layer model.
(b) What is the simplex stop and wait protocol? provide its
algorithms in terms of[8+8]
primitives at data link layer.
2. Compare channel efficiency in pure ALOHA and slotted
ALOHA.[16]
3. (a) Enumerate and illustrate the design problems of Network layer.
(b) What is shortest path routing? provide Dijkstra’s algorithm for
shortest path.[8+8]
Use the subsequent subnet for calculating shortest path.
4. (a) What is congestion? State the general principles of congestion control?
(b) How congestion control is handled in virtual circuits
subnets?[8+8]
5. Compare and contrast internet transport protocols TCP and UDP.[16]
6. (a) discuss with the help of a diagram the ATM reference model and
functions of various layers.
(b) provide ATM cell format. discuss how this format is used in various
ATM adaptation layers.[8+8]
7. (a) What is DNS? discuss usage of resource records.
(b) What is the architecture of WWW? explain client and server side
functionality of this architecture[8+8].
8. Write short notes on any 3 of the following:
(a) Architecture of email
(b) Differentiate ranging from Go back to N and selective repeat algorithms.
(c) Heirarchical routing
(d) Backward learning[4+4+4+4]

B    6    F

Attachment: jawaharlal-nehru-technological-university-hyderabad-2005-b-e-computer-science-43423-1.bmp

Earning:   Approval pending.